TITLE

GENERALIZING THE RASCH MODEL FOR CONSUMER RATING SCALES

AUTHOR(S)
Bechtel, Gordon G.
PUB. DATE
January 1985
SOURCE
Marketing Science;Winter85, Vol. 4 Issue 1, p62
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A probabilistic Rasch model is advocated for brand-attribute measurements which replace ubiquitous mean ratings. The usefulness of this model is then extended by showing that distinct latent processes, one extreme value and the other logistic, imply common probability structures for both its classical form and the generalization developed here. If given data reject the classical structure, an extended analysis is carried out in which logistic coefficients are estimated for the general model. These values are then used in a generalized-least-squares (GLS) procedure for estimating and testing the brand-attribute locations. An illustrative multiattribute analysis is given in which logistic coefficients and locations are found for 16 soft drinks on the continua of preference, sweetness, and fizziness. (Latent Distribution; Item Location; Category Boundary; Logistic Coefficient)
ACCESSION #
4475315

 

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